Introduction
Apple has just seeded the release candidate (RC) of macOS Tahoe 26.5 to developers, marking the final testing phase before the public launch. This version arrives approximately one week after the fourth beta, signaling that the update is nearly ready for widespread use. While no new user-facing features have been spotted in earlier betas, the RC focuses on squashing bugs and polishing system performance. For developers eager to test their apps or explore under-the-hood changes, this guide walks you through everything from prerequisites to completion.
What You Need
- A Mac that supports macOS Tahoe (compatible models listed on Apple's website)
- A free Apple Developer account (registration is free and only requires an Apple ID)
- A stable internet connection (download size ~2-5 GB)
- At least 30 minutes of uninterrupted time for the installation process
- Recommended: A full backup of your current system via Time Machine or another method
Step-by-Step Installation Guide
Step 1: Prepare Your Mac and Backup
Before you begin, ensure your Mac is compatible with macOS Tahoe. If you're already running a previous beta, you can proceed directly. However, it's wise to create a complete backup using Time Machine or a disk utility — a safety net if you need to revert later.
Step 2: Sign Up for a Developer Account (If Needed)
If you don't already have a free Apple Developer account, navigate to developer.apple.com and log in with your Apple ID. No paid membership is required; a free account gives you access to beta software and release candidates.
Step 3: Open System Settings
Click the Apple menu (top-left corner) and select System Settings. This is your command center for system-level configurations.
Step 4: Navigate to Software Update
In System Settings, scroll down and click General. From there, select Software Update. This panel shows your current macOS version and any available updates.
Step 5: Enable Beta Updates
Click the i (info) button next to Beta Updates (or toggle the option if present). A dropdown list of available beta channels appears. For the release candidate, choose macOS Tahoo 26.5 Developer Beta — note that Apple labels RCs under the same beta category.
Step 6: Select and Start the Update
After enabling beta updates, the Software Update panel refreshes and should display macOS Tahoo 26.5 Release Candidate. Click the Update Now button. The system will begin downloading the installer in the background.
Step 7: Follow On-Screen Instructions
Once the download completes (may take 10–30 minutes depending on your internet speed), a pop-up will prompt you to install. Read the license agreement if you wish, then click Agree. The installer will automatically restart your Mac and proceed with the installation. Your Mac may reboot once or twice — this is normal.
Step 8: Wait for the Final Setup
After installation, your Mac boots into the updated OS. You may see a short setup assistant that asks you to sign in to your Apple ID or adjust privacy settings. Complete these steps as desired.
Step 9: Verify the Installation
To confirm you're running the release candidate, go to About This Mac (Apple menu → About This Mac). The version number should read 26.5 RC or similar. For deeper verification, open System Settings > General > Software Update — it should show that your system is up to date.
Tips for a Smooth Experience
- Backup first, always. Release candidates are nearly final but can still contain unforeseen issues. A Time Machine backup lets you revert to macOS 26.4 if needed.
- No new features expected. Based on earlier betas, macOS Tahoe 26.5 focuses on bug fixes and performance improvements. If you're hoping for new tools, this update may not deliver.
- Check app compatibility. If you rely on mission-critical apps, test them thoroughly in this RC before updating your primary machine. Consider installing on a secondary Mac or a partition first.
- Keep your developer account linked. To continue receiving future betas, ensure your Apple ID is enrolled in the developer program and that Beta Updates remain enabled in System Settings.
- Report issues. Apple encourages developers to submit feedback via the Feedback Assistant app. This helps refine the final public release.
- Plan for power. Plug in your Mac before starting the installation — a power loss during the update could corrupt the system.
With these steps and precautions, you can safely install the macOS Tahoe 26.5 Release Candidate and enjoy the latest refinements Apple has prepared. Happy testing!